Thermodynamic, examples b
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1. This document discusses thermodynamics concepts related to heat engines and refrigerators. It provides example calculations for efficiency of different heat engines like Stirling engines and Carnot engines. 2. Multiple choice questions are provided related to efficiency, heat transfer, temperature of hot/cold reservoirs in Carnot engines and refrigerators operating on Carnot cycle. 3. Formulas for efficiency of different heat engines and refrigerators are given along with sample calculations.
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This document discusses heat engines, refrigerators, and the second law of thermodynamics. It contains the following key points:
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2. The Carnot cycle involves two reversible isothermal processes and two reversible adiabatic processes, and represents the maximum possible efficiency for a heat engine.
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1. A gas is compressed from 6.0 L to 4.0 L at a constant temperature of 5.0 atm. The work done on the gas is +30 liter atm.
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This document contains a test for an engineering thermodynamics exam with multiple choice and long answer questions. It covers topics like the first and second laws of thermodynamics, Carnot cycle efficiency, psychrometrics, gas properties, steam tables and Rankine cycle. The test has three parts with questions on thermodynamic processes, cycles, properties and applications to heating, cooling and power systems. Students are asked to analyze thermodynamic systems, calculate efficiencies, energy and mass transfers, exhaust velocities and more.
Me2202 engineering thermodynamics uq - nov dec 2011
This document contains a question paper for an engineering thermodynamics examination. It has two parts - Part A consists of 10 short answer questions worth 2 marks each. Part B contains 5 long answer questions worth 16 marks each. The questions test concepts related to thermodynamics, including the definitions of key terms, thermodynamic processes like the Carnot cycle, properties of pure substances and mixtures, psychrometric processes, and application of the first law and second law of thermodynamics to closed and open systems. The document also provides information on the regulations and maximum marks for the exam.
Thermodynamics || Physics || B.Optom
This document discusses the efficiency of a Carnot engine. It defines the efficiency formula as efficiency = (1 - T2/T1) x 100%, where T2 is the temperature of the heat sink and T1 is the temperature of the heat source. It then provides examples of efficiency calculations for Carnot engines working between different temperature ranges. It also discusses the temperature of the heat sink and source needed to achieve a given efficiency.
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2014
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2014BIBIN CHIDAMBARANATHAN
This document appears to be an exam question paper for an engineering thermodynamics course. It contains 15 multi-part questions testing concepts related to thermodynamics, including properties of gases, heat transfer, refrigeration cycles, steam power cycles, psychrometrics, and more. The questions involve calculating values like heat transfer rates, work output, cycle efficiency, enthalpy, entropy, and more for various thermodynamic processes and systems. Diagrams are also requested to illustrate some of the processes.Me2202 engineering thermodynamics uq - may june 2014
This document appears to be a question paper for an engineering thermodynamics exam consisting of multiple choice and numerical problems. It covers topics like thermodynamic equilibrium, Carnot cycle efficiency, ideal gas properties, vaporization enthalpy, adiabatic saturation temperature, gas turbine cycle analysis, heat pumps, refrigeration, steam power cycles, psychrometrics, and Maxwell relations. The problems involve calculations related to compression, expansion, heat transfer, work, efficiency, and using properties from thermodynamic tables and charts.
Me2202 engineering thermodynamics uq - nov dec 2015
This document appears to be an exam for an engineering thermodynamics course, consisting of 15 multi-part questions testing students' knowledge of key thermodynamics concepts. It begins with 10 short answer questions worth 2 marks each, followed by 5 longer form questions worth 16 marks each. The questions cover topics like the laws of thermodynamics, entropy, phase changes, psychrometrics, gas cycles, and thermodynamic processes and cycles. The exam is assessing students' understanding of fundamental thermodynamic principles as well as their ability to apply those principles to analyze thermodynamic systems and cycles.
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2011
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2011BIBIN CHIDAMBARANATHAN
This document contains a question paper for an engineering thermodynamics examination. It has 15 multiple part questions testing concepts related to thermodynamics, properties of gases and vapors, cycles, availability and irreversibility. The questions cover topics including gas laws, heat and work in thermodynamic processes, Rankine cycle, psychrometrics, mixtures of gases and thermodynamic properties. Students are required to calculate values, derive equations, define terms and explain concepts over the duration of the three hour examination.Me2202 engineering thermodynamics uq - april may 2011
This document contains an exam for a third semester mechanical engineering course on engineering thermodynamics. The exam has two parts: Part A contains 10 short answer questions; Part B contains 5 longer answer questions worth 16 marks each. The questions cover topics like the ideal gas law, Carnot's theorem, heat engines, refrigeration cycles, moist air properties, and availability/exergy analysis. The exam provides problems involving thermodynamic processes, cycles, mixtures of gases, and psychrometric properties of air.
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2014.
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2014.BIBIN CHIDAMBARANATHAN
This document contains a question paper for an engineering thermodynamics examination. It has 15 multiple part questions testing concepts related to thermodynamics, properties of gases and vapors, cycles, availability and irreversibility. The questions cover topics including gas laws, heat and work in thermodynamic processes, refrigeration cycles, properties of steam and gas-vapor mixtures. Students are asked to calculate values like heat, work, efficiency and determine conditions, properties and changes resulting from described thermodynamic processes.Me2202 engineering thermodynamics uq - april may 2011
This document contains an exam for an engineering thermodynamics course. It includes 15 multiple choice and numerical problems covering topics like the Carnot cycle, gas laws, heat engines, moist air properties, and thermodynamic processes. The exam tests students' understanding of key concepts in thermodynamics and their ability to apply those concepts to calculate values like work, heat, efficiency, and state properties.
6470genco paper
This document contains a 55 question multiple choice exam on mechanical engineering topics. The exam is divided into two sections, with Section A containing 70 marks worth of questions. The questions cover topics such as thermodynamics, heat transfer, fluid mechanics, mechanics, and materials. The format and content indicate this is a comprehensive exam assessing students' knowledge across various mechanical engineering subject areas.
BASIC AND APPLIED THERMODYNAMICS paper analysis GTU
1. The document analyzes past questions from a GTU paper on engineering thermodynamics. It summarizes the number of times various topics from two chapters (basic concepts and first law of thermodynamics) have appeared on papers from 2015 to 2018.
2. Key topics included intensive/extensive properties, open/closed/isolated systems, the first law of thermodynamics, the steady flow energy equation, work, heat, and applications like nozzles and turbines. Common example problems involved steam tables, turbines, refrigerators and calculating work, heat and efficiency.
3. The document provides a similar analysis for two additional chapters on the second law of thermodynamics and entropy, listing common theory and example questions
Me6301 engineering thermodynamics uq - nov dec 2014
This document contains the questions from a mechanical engineering thermodynamics exam. It is divided into two parts, with Part A containing 10 short answer questions worth 2 marks each, and Part B containing 5 longer answer questions worth 16 marks each. The questions cover topics like thermodynamic processes, cycles, properties of gases and vapors, availability, equations of state, irreversibility, and effectiveness. The exam instructions specify that all questions must be answered, units must be included, and tables/diagrams can be used.
Me2202 engineering thermodynamics uq - nov dec 2010
This document contains a question paper for an engineering thermodynamics examination. It has two parts with a total of 15 questions. Part A contains 10 multiple choice questions worth 2 marks each. Part B contains 5 long-form questions worth 16 marks each. The questions cover various topics in engineering thermodynamics including processes, cycles, properties of mixtures, psychrometrics, and refrigeration. Students are asked to solve problems involving gases, vapors, heat transfer and thermodynamic cycles. They are also asked to sketch processes on pressure-temperature and temperature-entropy diagrams.
Ptme8201 engineering thermodynamics uq - april may 2014
This document contains questions for an engineering thermodynamics exam, including multiple choice and numerical problems. It covers topics like the first and second laws of thermodynamics, properties of pure substances and gas mixtures, psychrometrics, vapor power cycles, availability analysis, and refrigeration. The exam has two sections - Part A contains 10 short answer questions worth 2 marks each and Part B contains 5 long answer numerical problems worth 16 marks each. Questions require calculations of properties, cycles, mixtures and thermodynamic processes using concepts like heat, work, entropy, availability and refrigeration.
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2007
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2007BIBIN CHIDAMBARANATHAN
This document contains a mechanical engineering exam with questions on thermodynamics. It includes:
1) Definitions of key thermodynamics concepts like internal energy, reversible processes, and equations of state.
2) Calculations involving processes like throttling, isentropic expansion, isothermal compression, and heat exchange.
3) Explanations of thermodynamic cycles like Rankine and concepts like entropy, Maxwell's relations, and the Joule-Thomson effect.
4) Diagrams including p-V, T-s, psychrometric charts and the depiction of phase changes and transitions on a p-T diagram.
5) Determination of properties for pureSimilar to Thermodynamic, examples b (20)
Me6301 engineering thermodynamics uq - may june 2016
Me6301 engineering thermodynamics uq - may june 2016
Me2202 engineering thermodynamics uq - april may 2010
Me2202 engineering thermodynamics uq - april may 2010
Me2202 engineering thermodynamics uq - nov dec 2014
Me2202 engineering thermodynamics uq - nov dec 2014
Me2202 engineering thermodynamics uq - nov dec 2011
Me2202 engineering thermodynamics uq - nov dec 2011
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2014
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2014
Me2202 engineering thermodynamics uq - may june 2014
Me2202 engineering thermodynamics uq - may june 2014
Me2202 engineering thermodynamics uq - nov dec 2015
Me2202 engineering thermodynamics uq - nov dec 2015
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2011
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2011
Me2202 engineering thermodynamics uq - april may 2011
Me2202 engineering thermodynamics uq - april may 2011
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2014.
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2014.
Me2202 engineering thermodynamics uq - april may 2011
Me2202 engineering thermodynamics uq - april may 2011
BASIC AND APPLIED THERMODYNAMICS paper analysis GTU
BASIC AND APPLIED THERMODYNAMICS paper analysis GTU
Me6301 engineering thermodynamics uq - nov dec 2014
Me6301 engineering thermodynamics uq - nov dec 2014
Me2202 engineering thermodynamics uq - nov dec 2010
Me2202 engineering thermodynamics uq - nov dec 2010
Ptme8201 engineering thermodynamics uq - april may 2014
Ptme8201 engineering thermodynamics uq - april may 2014
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2007
ME6301 ENGINEERING THERMODYNAMICS ANNA UNIVERSITY QUESTION PAPER may june 2007
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- 1. HEAT ENGINES AND REFRIGERATORS THERMODYNAMICS Department of Physics, Faculty of Science Jazan University, KSA Part-7 222 PHYS MC questions
- 2. Lecture 13, p 2 l 2 1 2 1 ( )ln ( n 2 0.69) 3 ( ) ln 2 100(0.69) 16.9% 150 373(0.69) h c by h h c h V T T W V Q V T T T V Let’s put in some numbers: V2 = 2V1 n = 3/2 (monatomic gas) T2=Th = 373K (boiling water) T1=Tc = 273K (ice water) For comparison: ηcarnot = 1 – 273/373 = 26.8% 1: find the efficiency of Stirling engine with the following parameters
- 3. 2: In a Carnot engine 800 J of heat is absorbed from a source at 400 K and 640 J of heat is rejected to the sink. The temperature of the sink is a) 320 K b) 100 K c) 273 K d) 250 K e) 200 K 3: A refrigerator operates in a cyclic and reversible manner (Carnot cycle).The temperature inside the refrigerator is 0°C and the room temperature is 27°C. The absorbed heat from the interior of the refrigerator Q1 = 334.72x103 J . If the coefficient of performance of the refrigerator, COP= Q1/W .the magnitude of heat Q2 rejected in the room is: a) 455.8J b) 310.6 J c) 367.8J d) 340 J e) None c c h h Q T Q T 2 1 2 1 ch h c QQ Q Q T T T T
- 4. 5: The efficiency of a Carnot engine is 35.0%. What is the temperature of the cold reservoir if the temperature of the hot reservoir is 500 K? A) 175 K B) 325 K C) 269 K D) 231 K
- 5. 6: The maximum efficiency of a heat engine that operates between temperatures of 1000 K in the firing chamber and 600 K in the exhaust chamber is most nearly (A) 33% (B) 40% (C) 60% (D) 67% (E) 100% 7: The theoretical (Carnot) efficiency of a heat engine operating between 600C and 100C is A) 16.7 % B) 20.0 % C) 42.7 % D) 57.3 % E) 83.3 % 8: A heat engine takes in 200 J of thermal energy and performs 50 J of work in each cycle. What is its efficiency? A) 500 % B) 400 % C) 25 % D) 20 % E) 12 %
- 6. 9: A monoatomic ideal gas is used as the working substance for the Carnot cycle shown in the figure. Processes A→B and C → D are isothermal, while B → C and D → A are adiabatic. During process A → B, there are 400 J of work done by the gas on the surroundings. How much heat is expelled by the gas during process C → D? A) 1600 J B) 800 J C) 400 J D) 200 J E) 100 J
Editor's Notes
- Comment: You will get the best efficiency for the largest deltaT, and for the largest “compression ratio, V2/V1.